520019808 has 192 divisors, whose sum is σ = 1720922112. Its totient is φ = 133562880.

The previous prime is 520019777. The next prime is 520019809. The reversal of 520019808 is 808910025.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520019809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 761035 + ... + 761717.

It is an arithmetic number, because the mean of its divisors is an integer number (8963136).

Almost surely, 2^520019808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520019808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860461056).

520019808 is an abundant number, since it is smaller than the sum of its proper divisors (1200902304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520019808 is a wasteful number, since it uses less digits than its factorization.

520019808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 520019808 is about 22803.9428169779. The cubic root of 520019808 is about 804.1553621697.

The spelling of 520019808 in words is "five hundred twenty million, nineteen thousand, eight hundred eight".